JPH0780208B2 - Molding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for separately molding different materials to obtain a molded product such as rubber or resin.

[0002]

2. Description of the Related Art As a molding apparatus for obtaining an integrally molded product such as rubber and resin made of a plurality of different materials, an apparatus as shown in FIG. 6 is conventionally known. This molding device is (C)
As shown in, upper mold 100, middle mold 102, 104,
With the lower mold 106 clamped, the cavity 108 and the middle mold 10 on the mating surface side of the middle mold 102 with the upper mold 100.
4, the cavity 110 on the mating surface side with the lower mold 106.
Then, the molding materials A and B are individually injected by two injection devices, and then the middle molds 102 and 104 are rotated 180 ° in a mold open state as shown in FIG. After that, the molding materials A and B are integrated by pressing again in the mold clamping state shown in (C), and at the same time, the molding materials A and B are injected into the cavities 108 and 110 in the same step, and then shown in (A). As described above, the mold is opened and the product (molded product) 112 is taken out.

After the product 112 is taken out, the medium size 10
2, 104 are rotated by 180 ° so that the upper and lower directions are opposite to each other, and the A and B materials are integrated and injected again in parallel according to the steps (B) and (C).

[0004]

However, in the case of this molding apparatus, it is difficult to cope with the case where it is necessary to change the respective molding conditions for the A material and the B material. For example, when the adhesive strength is a problem in a rubber molded product, it is difficult to cope when it is necessary to make the vulcanization time of the A material and the vulcanization time of the B material different, and it is difficult to obtain a good product. There is such a problem.

Further, while the product is being taken out, neither the A material injection operation nor the B material injection operation can be performed (two injection devices cannot be operated), which is disadvantageous in terms of work efficiency. There is a problem that the cycle time becomes long. Further, in the case of this molding apparatus, there are problems that the structure of the molding die becomes complicated and it is difficult to control the temperature of the middle die.

[0006]

The apparatus of the present invention has been devised to solve such a problem, and the gist thereof is to separately injection-mold different kinds of molding materials, and to form these different materials. A molding apparatus for obtaining an integrated molded article consisting of (a) a plurality of molding machine units each equipped with an injection device and a mold clamping device, and (b) a part of the molding die between the molding machine units. A mold exchanging device for exchanging, wherein the mold exchanging device is (a) arranged across the plurality of molding machine units, and guide rails for moving and supporting a part of the molding die; b) It has a drive means for driving a part of the mold along the guide rail.

[0007]

As described above, in the apparatus of the present invention, each of the plurality of injection molding units is provided with the injection device and the mold clamping device, and the molding material is individually injected and the mold clamping is performed. And a mold exchanging device is disposed across the injection molding machine units so that a part of the molding die can be exchanged between one injection molding machine unit and another injection molding machine unit. Has become.

Therefore, in the apparatus of the present invention, one injection molding machine unit is used to inject, for example, the A material, and then a part of the mold in which the A material is injected is moved to another injection molding machine unit. By injecting the B material there, the A material and the B material can be compounded to obtain an integral molded article.

Further, in the apparatus of the present invention, since the mold clamping device is provided in each injection molding machine unit, the injection of the A material and the injection of the B material are not performed simultaneously but independently. Therefore, it is possible to concurrently inject the material A or the material B while the product is being taken out, which can improve the work efficiency and shorten the cycle time of product molding. Also, since the injection molding time can be set independently in each injection molding machine unit, the molding conditions of each molding material can be controlled independently.

In the apparatus of the present invention, the drive means is operated while a part of the molding die is supported by the guide rail, so that the molding die can be easily operated between one injection molding machine unit and another injection molding machine unit. Has the advantage of being interchangeable.

According to a second aspect of the present invention, the guide rail is provided in a separated state between the injection molding machine units, and
Rail drive means for driving each guide rail in the mold clamping / mold opening direction in each injection molding machine unit is provided.

That is, a part of the forming die is moved together with the guide rails so that the forming die can be clamped and opened. By doing so, part of the forming die can be easily replaced and the die can be opened and closed. You get the benefit of being able to do it.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an example of the molding apparatus of the present invention, which is composed of two injection molding machine units 1
It has 0 and 12.

Each of the injection molding machine units 10 and 12 is provided with an injection device 16 including an injection cylinder 14 and a mold clamping device 20 having a pressure ram 18, and the two injection molding machine units 10 and 12. A mold exchanging device 2 for exchanging a part of the molding die so as to extend over 12 spaces
Two are provided. Reference numeral 24 is a product take-out device.

2 and 3 show the structures of the mold exchanging device 22 and its peripheral portion. In these figures,
26, 28, 30 are the respective injection molding machine units 1
The lower plate, the upper plate, and the tie rods are provided at 0 and 12, and a guide rail 32 is provided at an intermediate position between the lower plate 26 and the upper plate 28.

The guide rail 32 is slidably fitted to the tie rod 30, and a rail elevating cylinder 34 is connected to the guide rail 32 so that the guide rail 32 can be moved up and down along the tie rod 30. It has become.

As shown in FIG. 3, the molding machine unit 1
The upper mold 36 and the middle mold 38 are fixed to the upper plate 28 at 0, and the lower mold 40-1 corresponding thereto is fixed to the guide rail 3
Held by two. On the other hand, in the molding machine unit 12, the upper mold 42 is fixed to the upper plate 28, and the corresponding lower mold 40-2 is held by the guide rail 32.

As shown in FIG. 2, each lower mold 40-1,
40-2 has a collar-shaped portion, these collar-shaped portions are fitted in the groove of the guide rail 32, and the support roller 4 is provided.
It is supported by 6, 48 so as to be slidable in the horizontal direction.

As shown in FIG. 3, the guide rail 32 is arranged so as to extend between the molding machine units 10 and 12, and the left and right ends are extended laterally from the units 10 and 12. And the guide rails 3 are separated from each other in the region between the units 10 and 12.
2 can be moved up and down independently for each unit 10, 12.

A total of four cylinders (rodless cylinders) 50 are fixedly installed on the upper side and the lower side of the guide rail 32. With these cylinders 50, a sliding body 54 having an engaging claw 52 is moved in the left-right direction. It is designed to be driven back and forth.

Each of the sliding bodies 54 has an engaging claw 52 which has a lower mold 40-.
It has a function of engaging with 1 or 40-2 and moving it in the horizontal direction. Here, the two upper sliding bodies 54 push the lower die 40-1, and the two lower sliding bodies 54 push the lower die 40-2. However, the two sliding bodies 54 on the left side in the figure push the lower dies 40-1 and 40-2 to the right, and the sliding body 54 on the right pushes the lower dies 40-1 and 40-2 to the left.

The product take-out device 24 has a chuck 56 and a chuck elevating cylinder 58 as shown in FIG. A chute 59 for discharging the product is provided at a lower portion corresponding to the takeout device 24.

Next, the operation of the apparatus of this embodiment will be described together with the procedure for molding a composite rubber product (indicated by reference numeral 62 in FIG. 5) made of different rubber materials. In the molding of the composite rubber product 62 using the molding apparatus of this example, the molding die (upper die 42, upper die 42,
The lower mold 40-2) is clamped, and the rubber material B is injected into the cavity of the lower mold 40-2.

For mold clamping in the injection molding machine unit 12, the guide rail 32 on the unit 12 side is raised by the rail cylinder 34 and then the pressure ram 18 is raised.
This is performed by pressing the upper mold 42 and the lower mold 40-2 in the vertical direction.

Now, after the rubber material B is injected on the injection molding machine unit 12 side, the guide rail 32 and the pressure ram 18 on the injection molding machine unit 12 side are then lowered, and FIG.
As shown in (A), the upper mold 42 and the lower mold 40-2 are opened (step (II) in FIG. 5), and in this state, the lower mold 40-1 is connected between the injection molding machine units 10 and 12. 40-2 is exchanged (step (III)).

Specifically, with the guide rail 32 on the injection molding machine unit 12 side and the guide rail 32 on the injection molding machine unit 10 side aligned at the same height, the lower mold of the injection molding machine unit 10 is set. 40-1 is pushed to the right by the cylinder 50 on the upper left side in FIG. 4B, while the lower mold 40-2 on the injection molding machine unit 12 side is pushed to the left in the figure by the cylinder 50 on the lower right. Move.

Next, the injection molding machine units 10 and 12 are clamped, the rubber material A is injected into the cavity of the middle mold 38 in the injection molding machine unit 10, and the lower mold 40-1 is injected in the injection molding machine unit 12.
Then, the rubber material B is injected. By injection of the material A in the injection molding machine unit 10, an integrated composite rubber product made of different materials of the material A and the material B is molded (step (IV)).

Next, the molds are opened in each of the injection molding machine units 10 and 12, the molded composite rubber product 62 is taken out (step (V)), and the lower molds 40-2 and 40- are again formed.
1 is exchanged between the injection molding machine units 10 and 12 (step (VI)), then the process returns to step (IV) to perform mold clamping and injection, and thereafter, the operations up to step (VI) are repeated. Thereby, the composite rubber product 62 is molded one after another.

The composite rubber product 62 can be taken out by the take-out device 24 having the chuck 56 after pulling the lower mold 40-2 or 40-1 to the left side of the injection molding machine unit 10 in the figure. it can. And the product 6 taken out
2 can be dropped to the chute 59 below by releasing the grip by the chuck 56 and discharged to the outside by the chute 59.

In the case of the apparatus of this example, each of the injection molding machine units 10 and 12 has an injection apparatus 16 and a mold clamping apparatus 20.
The rubber materials A and B can be independently injected. Therefore, the vulcanization conditions of the materials A and B can be set and controlled independently.

The rubber material B can be injected on the injection molding machine unit 12 side even while the product 62 is being taken out, and the cycle time for product molding can be shortened.

Further, according to the apparatus of this embodiment, the common lower molds 40-1 and 40-2 are used for the material B even if the molding die (medium die) is not rotated unlike the molding apparatus shown in FIG. The advantages that the single injection can be performed and the material A and the material B can be integrated, the mold structure can be simplified, and the temperature of the molding die can be easily controlled.

In the case of the apparatus shown in FIG. 6 described above, it is necessary to use the same mold to separately inject different materials in the upper and lower parts and to integrate the different materials in the middle part. There is a problem that it is difficult to control the temperature of the middle part, especially the middle molds 102 and 104 because it is necessary to stack the molds in multiple stages.
Since the A material and the B material are separately injected by different molding dies while using Nos. 1 and 40-2, such a problem does not occur.

In addition to the simplification of the mold structure, the product 62 can be taken out while the lower molds 40-1 and 40-2 are taken out of the injection molding machine unit 10, so that the work is easy. There are certain advantages.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, the present invention can be applied when a resin material is compounded to obtain an integrated molded article,
Further, in some cases, it can be applied to obtain an integrally molded product of three or more different materials. Others The present invention can be configured in a form in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is an overall view of a molding apparatus that is an embodiment of the present invention.

FIG. 2 is a side view of a main part of the same molding apparatus.

FIG. 3 is an enlarged view of a mold exchanging device and a peripheral portion of the same molding apparatus.

FIG. 4 is an operation explanatory view of the same molding apparatus.

FIG. 5 is an explanatory view of a procedure for molding a composite molded article using the same molding apparatus.

FIG. 6 is an explanatory view of an example of a conventional molding apparatus and its defects.

[Explanation of symbols]

 10, 12 Molding machine unit 16 Injection device 20 Mold clamping device 22 Mold exchange device 32 Guide rail 34 Rail cylinder 50 Cylinder 52 Engaging claw 54 Sliding body A, B Rubber material

Claims (2)

[Claims] 1. A molding apparatus for separately molding different kinds of molding materials to obtain an integrated molded article made of the different materials, comprising: (a) a plurality of molding apparatuses each including an injection device and a mold clamping device. Machine unit, and (b) a mold exchanging device for exchanging a part of a molding die between the molding machine units, the mold exchanging device being (a) arranged across the plurality of molding machine units. And a guide rail for supporting and moving a part of the mold and (b) driving means for driving a part of the mold along the guide rail. Molding equipment. 2. The guide rails are separated between the injection units so that each of them can move independently in the mold clamping / mold opening direction, and the mold exchanging device separates the guide rails in the separated state. The molding apparatus according to claim 1, further comprising rail driving means for driving a part of the molding die supported by the guide rails in a mold clamping / mold opening direction.